Halve the thickness, weight and price, double user storage and battery life, and solve the complaints reviewers have had (poor usability when on lap legs crossed with the keyboard, "modern" app startup time) and then we might be talking about a hit.
Maybe the keyboard piece could contain the main battery and you could detach it and plug in from the other side, such that the keyboard+main.bat. pieces keys would face the back of the part containing the display, and the keyboards underside would be the bottom of the device when used as a tablet. To facilitate this transition, there would be a smaller battery inside the display containing piece than supplies power while you are switching the keyboard+mainbattery to the other side (laptop->tablet form). I haven't really deeply thought about this though so there could be some issues I haven't anticipated. I just noted eg. Anandtech complaining about the rigidity when used legs crossed, if the keyboard contained the main battery this would distribute the weight better and provided more rigidity.